Power loading apparatus



J. C. LUKACHOVIC POWER LOADING APPARATUS Jul 14, 1925.

2 Sheets-Sheet 1 Filed Nov. 25, 19255 INVENTOR g ATTORNEY July 14, 1925. 1,545,965

J. c. LUKACHOVIC POWER LOADING APPARATUS Filed Nov. 23, 1923 2 Sheets-Sheet 2 INVENTOR Maw ATl'O RNE Y Patented July 14, 1925.

UNITED STATES PATENT OFFICE.

JOSEPH C. LUKACHOVIC, OF DUNELLEN BOROUGH, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, 'IO RANSOME CONCRETE MACHINERY COMPANY, OF PLAINFIELD, NEW JERSEY, A CORPORATION OF NEW JERSEY. I

POWER LOADING APPARATUS.

T 0 all whom it maycohoern:

Be it known that I, JOSEPH C. LUKACHO- v10, a citizen of the Republic of Hungary,

and a resident of the borough of Dunellen, Middlesex County, State of New Jersey, have invented certain new and useful Improvements in Power Loading Apparatus, of which the following is a specification.

The improvements relate primarily to apparatus for loading or charging concrete mixers. and the'like, in which a charging bucket or hopper is so mounted as to receive a charge of materials to be mixed at or near. the ground, and is provided with hoisting means whereby it is raised and caused to dump its load into the mixing drum. They are adapted however to be used for other and analogous purposes, with necessary modifications. The invention nevertheless in so far as it is designed for use in connection with the particular apparatus referred to has certain features which distinguish it from other hoisting apparatus whether used to operate mechanism for loading or unloading materials or for other purposes, and thereforewhile certain features of the invention are of broad application, other features are intended to co-operate with and are to be considered solely in combination with the apparatus described and shown, the entire apparatus set forth in the claims constituting a new and useful combination.

Among the objects of the improvements are the production of a differential hoisting mechanism which will act with increased and decreased power and decreased and mcreased speed at different stages of its operation to accommodate an increase or de-- crease of the load, automatically, and with out the necessity for regulating the source of power or adjusting any 'of the parts, and without utilizing mechanism involving movements which cause an undesirable change in the relative positions of the parts;

the avoidance of unnecessary friction and The improvements are illustrated in the accompanying drawings, in which Fig. 1 is an end elevation of a hoisting and lowering apparatus involving the improvements, and Fig. 2 is a side elevation thereof, certain parts of the mechanism in connection with which it is used being shown diagrammatically. I

In the drawings 1 represents a shaft mounted in suitable bearings 2, 2 on a portion of the frame of the machine, shown at 4 is another shaft mounted on a part 5 of the frame. Drums 6 and 6 are keyed to the outer-portions of the shaft 1, and on the outer portions of the shaft 4 sheaves 7 are mounted for rotation. On the drums the cables 8, 8 are adapted to be wound, these cables passing over the sheaves 7 and extending down to the loading bucket or hopper 9. The drums have grooves therein to receive the cables and are fixed against longitudinal as well as rotary movement on their shaft, while the sheaves 7 are permitted to move lengthwise of their shaft to a limited extent as the drums wind, so that the cables will atall times be substantially vertical and in line with the grooves of their drums and sheaves, and so that undue friction and strain on the said parts and danger of the cable jumping its groove are avoided. The sheaves are limited in their outward movement by the heads 10.

On'one end of the shaft 3 the conical drum 11 is keyed, so that the shaft can be rotated thereby at varying speeds, and rotating power applied thereto in varying degrees. To this end the drum is providedwith a spiral groove 12 on its face, the diameter of which increases and decreases with the diameter of the drum, and in this groove a cable 13 is wound. The opposite end of the cable 13 is adapted to be wound on the grooved tapering drum 14: keyed to a shaft 15 which is connected with a suitable source of power, and is disposed at right angles to the shaft 1. The length of the drum 14: is approximately equal to the distance radially from the outer end of the groove 12 to its inner end on the drum. '11,

and as the arrangement of the shafts of the two drums places the drum 14 substantially parallel with the winding surface of the drum 11, and the cable winds on one drum as it unwinds from the other, the said cable will be at all times substantially vertical and approximately in line with the grooves of the drums. Therefore in the winding and unwinding operations the cable will enter the grooves of the two drums without any unnecessary friction or strain, thus avoiding wear and unnecessary strain on the cable and the drums, prolonging the life of both, and saving a certain amount of power.

As the cable 13 is wound on the drum 11, when the hopper 9 is lowered, and unwound from the drum 14, at the start of the hoisting operation the drum 11 will rotate slowly, and at the same time, owing to the great superiority of its diameter over the diameter of the drum 14 the power will be at its maximum. As the drum 14L winds the cable the speed of the winding, and consequent m0- mentum of the hopper, increases and the power decreases. It will thus be seen that the maximum of power and minimum of speed are at the beginning of the hoisting operation, where the load is greatest, and that when the hopper is lowered the application of a brake upon shaft 15 will have a greater tendency to check the descent of the hopper as the hopper nears the ground, thus providing for an acceleration of speed and decrease of power as the hopper is raised and an increase in braking power and de crease in speed as it is lowered. At the same time the construction and arrangement of the drums and sheaves is such that the hoisting and lowering movements may take place with great speed, regardless of the load carried, without undue friction, and without danger of either of the cables slipping from its grooves.

It will also be seen that the drums may be removed and replaced by other drums, and the hoisting apparatus thus adjusted to different duty, without disturbing the relation of the parts or requiring any changes in their construction Or arrangement. It will also be seen that the forms of the drums and sheaves, and their particular arrangement may be changed and that other variations may be made without departing from the scope of the invention.

What I claim is:

1. The combination of a winding drum, a cable adapted to be wound thereon and connected with a variable load and means for varying the power applied to the drum to correspond with variations in the load comprising another drum operatively connected with the first drum and having a face inclined toward its axis, a cable adapted to be wound on said tapering face, and a third drum connected with a source of power upon which the last named cable is adapted to be wound, said drum having a winding face constantly maintained at an angle to the axis of the second. drum.

2. In combination with the mechanism of claim 1, a sheave over which the first cable travels, said sheave being mounted to have movement parallel with the axis of the first drum.

3. In the mechanism of claim 1, the winding face of the third drum increasing in diameter toward the axis of the second drum.

4:. In the mechanismof claim 1, the said angle of the winding face of the third drum to the axis of the second drum being approximately a right angle.

5. The combination of a winding drum, a

cable adapted to be wound thereon and connected with a loading device, a sheave between the drum and the loading device over which said cable runs, said sheave being mounted to have movement bodily parallel with the axis of the drum, another drum rigidly connected with the said winding drum and having a face inclined toward its axis, said two drums being mounted on the same shaft, and a cable winding on theinclined face of the said second drum.

6. In a device of the character described, the combination of a winding drum having an inclined face providing a winding sur face of varying diameter a shaft upon which said drum is mounted, a second winding drum and a shaft upon which it is mounted disposed substantially at right angles tothe shaft of thefirst drum, and a cable connected with both drums and adapted to be wound alternately on one and then the other of said drums.

7. In a device of the character described,: the combinatlon of a winding drum. having an inclined face providing a winding surface of varying diameter a shaft uponwhich said drum is mounted, a second winding drum and a shaft upon which it is mounted disposed substantially at right angles to the shaft of the first drum, and a cable connected with both drums and adapted to be wound alternately on one and then the other of said drums, said cable being secured to a portion of the second drum which is removed from the plane of the shaft of the first drum and the said face of the first drum being inclined the county of Middles ex, State of New Jer- SQ V JOSEPH c. LUKACHOYIO. 

